The siege of Tayef, division of the spoil, etc., are related by Abulfeda (p. 117 - 123) and Gagnier, (tom. iii. p. 88 - 111.) It is Al Jannabi who mentions the engines and engineers of the tribe of Daws. The fertile spot of Tayef was supposed to be a piece of the land of Syria detached and dropped in the general deluge